-oid, -oidal, -oidism, -odic

(Greek: a suffix; like, resembling, similar to, form)

humanoid
1. Resembling a human being in appearance.
2. An android (male form) or gynoid (female form).
hyaloid
hydrocephaloid
Resembling hydrocephalus because of an apparently enlarged cranium which is seen in some cases of starvation, but without any abnormal accumulation of cerebrospinal fluid.
hydrocolloid
An elastic water-based impression material.
hydroid
1. Related to, or resembling, the hydra; of or pertaining to the Hydroidea.
2. That form of hydrozoan that is asexual and grows into branching colonies by budding.
hyoid
hyothyroid
hypnoid
Resembling a state of hypnosis or sleep.
hypnoidal
A reference to a condition between sleep and waking; resembling sleep.
hypnotoid
Like or resembling the hypnotic state.
hysteroid, hysteroidal
Resembling, or simulating, hysteria or the loss of control over the emotions,
ichthyoid, ichthyoidal
1. Similar to a fish, especially in structure or appearance.
2. A vertebrate such as a lamprey or hagfish that is similar to a fish.
icosanoid
isophytoid
An individual plant of a compound plant-organism, not differentiated from the rest.
isozooid
A zooid, or individual of a compound or “colonial” animal organism, not differentiated from the rest; opposite of allozooid.

Inter-related cross references, directly or indirectly, involving word units dealing with "form, shape, appearance": eido-; figur-; form-; icono-; ideo-; imag-; morpho-; typo-.